Ubuntu – Page 4

June 2, 2023 by dev

How to create su user on Linux

First add the user, run:
```
sudo adduser <UserNameHere>
```
Add the user to sudo group by typing the command in terminal for Ubuntu version 12.04 and above:
```
sudo adduser <UserNameHere> sudo
```
In an older version of Ubuntu (version 12.04 and older), run:
```
sudo adduser <UserNameHere> admin
```
Verify it:
```
id <UserNameHere>
```

April 4, 2023 by dev

Create a configuration file to install the specific cPanel version that supports Ubuntu 20.04.

vi /etc/cpupdate.conf

Add below text and save.

CPANEL=98

1. Disable Firewall

systemctl status firewalld.service

In case firewall and rules active then disable them

iptables-save > ~/firewall.rules
systemctl stop firewalld.service
systemctl disable firewalld.service

Disable SELinux

Edit the /etc/selinux/config file

vi /etc/selinux/config

Set the SELINUX parameter to disabled, and then reboot the server.

SELINUX=disabled

Perl installation

yum -y install perl

2. Run system update

apt update & apt upgrade

3. Set fully qualified hostname

3.a. Check your existing hostname

hostname

3.b. Set fully qualified hostname

hostname server.example.com

3.c. Now, open file /etc/hosts

vi /etc/hosts

Add hostname with IP. For example

123.255.123.2.89 server.example.com server

3.d. Save the file and reboot

3.e. Confirm the hostname

hostname

4. Install Cpanel/WHM on Ubuntu 20.04 LST Server

cd /home && curl -o latest -L https://securedownloads.cpanel.net/latest && sh latest

Let the system perform the installation.

5. Access WHM/CPanel Web interface and confirm license.

https://server-IP-address:2086

April 3, 2023 by dev

Check whether Screen is installed
```
which screen
```
If Screen is not installed on your system, run the following command:
1. If your system uses yum, you can install Screen with the command below
```
yum install screen
```
2. If your system uses apt, you can install Screen with the command below
```
apt install screen
```
To run a Screen session, enter the screen command.
```
screen
```
If your session disconnects for some reason, log back in to your server and run the screen -r command.
```
screen -r
```
This will reconnect you to your Screen session.

April 1, 2023 by dev

Easy ways to view the distribution and version number of Linux OS.

cat /etc/*release

For OS release details

cat /etc/os-release

For name and version number of your current distribution

lsb_release -d

To show additional information of current distribution version

lsb_release -a

To shows the version of the Linux kernel that you’re currently using.

uname -r

For more information

uname -a

You have to install Inxi for this

apt-get -y install inxi

Once installed, you can view hardware, host, Linux kernel, desktop environment, and distribution with this simple command:

Inxi -Sz

June 20, 2021 by dev

Backup of all important data before proceeding! Changes to the partition table always bear the risk of complete data loss.

Boot your VPS / VDS into the rescue-system
Now connect through VNC (How to use VNC to connect to your VPS and VDS)
Login as “root”
To perform changes on the partition easily use gparted
To start the GUI type “startxfce4” within VNC console and wait a few seconds until the graphical interface appears
On the upper left side you will see “Applications”, open it and select “Run Program”
Type “gparted” within the application finder and the app should start immediately
Now you can resize and create new partition with unallocated space.